I couldn't find any cause. I modified system a bit to reuse render targets a little bit more sparse but that may not help much. What I also did is that I added a lots of logs to get what's going on with the display. If you could download http://voidroom.com/temp/tea_v_0_3_6_176.zip (unpack it to a separate folder as it logs a lot and logs grow quickly), run it and start the game. When it starts, just look at your hands and then quit the game. And send me a log file. I will investigate if the system uses proper render targets. If that fails, I will have to think of some other solution.
Viewing post in v 0.3.6 (crouching maze and adjustable height) comments
Voilà pour vous:
First log: No weapons
Second log: MSAA 16x = Blurry display
Third log: MSAA 2x = Display clear and OK
https://drive.google.com/open?id=1yGwX2PzQmRS88x7Lbvc0kDX0OLu684G7
Thank you :D That MSAA x16 was responsible for the blur. I didn't have much time to investigate but for the displays there was no need to use MSAA anyway, so that is now fixed. I couldn't repro the missing weapons, but I think that I got it fixed.
Check http://voidroom.com/temp/tea_v_0_3_6_177.zip